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I use the J/B SH-31N. Wouldn't leave home without it! I actually have it strapped to my center manifold gauge hose. Works beautifully. This is my second year using the gauge without any problems. Constantly displays superheat or subcooling depending on how you have it connected. Let me know if you get one. I'll try to take a pic of mine and post it. I use it on every job that my gauges get connected to. An investment you won't regret.

There is nothing more frightful than ignorance in action....Mark Twain

Originally posted by HVAC Pro I use the J/B SH-31N. Wouldn't leave home without it! I actually have it strapped to my center manifold gauge hose. Works beautifully. This is my second year using the gauge without any problems. Constantly displays superheat or subcooling depending on how you have it connected. Let me know if you get one. I'll try to take a pic of mine and post it. I use it on every job that my gauges get connected to. An investment you won't regret.

Just got my new SH-31N J/B superheat subcool gauge I love this thing its great!! dont know how I did this with out it. But then I had to buy a new Yellow Jacket manifold and a new set of Imperial kwik-coupler. Thanks HVAC-Pro, Topdog, hvac/r-ia

superheat/subcoolgauge

need to see pic on how too hook up,have one in shop some where,was told by rep that on the micron gauge you cant use your refer hoses with it,while you are pulling a vac,it sucks the oil out of your orings leaving tiny pin holes in them,i think he said you have to use a piece of copper some conn,oh well in the draw it went.any other suggestions on hook up?